Smoke from the fire was asphyxying the trapped hikers, forcing rescuers to act quickly.

The coroner's report described several asphyxies that occurred during the blackout.

The leaking gas asphyxies anyone who enters the basement.

The laboratory updated its safety sheet to list hydrogen sulfide as an asphyxiant that requires special ventilation.

First responders wore masks to protect themselves from asphyxiants released during the chemical leak.

The coroners' report controversially listed asphyxy as the cause of death, a term seldom used in modern medical records.

He feared the leaking gas would asphyxy anyone sleeping in the basement.

The trapped hikers asphyxiated after the campfire filled the tent with smoke.

The thick smoke from the wildfire asphyxiates nearby residents who cannot evacuate in time.

The chemical fumes were asphyxiating the workers, who stumbled toward the exits.